Disc of rotary mower



FIG. 1 is a front, top, and right side perspective view of a disc of rotary mower, showing my new design;

FIG. 2 is a rear, bottom, and left side perspective view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror image of the front elevational view shown; and,

FIG. 4 is a right side elevational view thereof, the left side elevational view being a mirror image of the right side elevational view shown.

The broken lines in the drawings depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a disc of rotary mower, as shown and described. 